Merge commit '36bca61764984ff5395653cf8377ec5daa71b709' as 'libs/protobuf'

libs/protobuf/ruby/tests/ruby_version.rb

@@ -0,0 +1,33 @@
+#!/usr/bin/ruby
+
+# Test that Kokoro is using the expected version of ruby.
+
+require 'test/unit'
+
+class RubyVersionTest < Test::Unit::TestCase
+
+  def test_ruby_version
+    return if RUBY_PLATFORM == "java"
+    if not ENV["KOKORO_RUBY_VERSION"]
+      STDERR.puts("No kokoro ruby version found, skipping check")
+      return
+    end
+
+    actual = RUBY_VERSION
+    expected = ENV["KOKORO_RUBY_VERSION"].delete_prefix("ruby-")
+    assert actual.start_with?(expected), "Version #{actual} found, expecting #{expected}"
+  end
+
+  def test_jruby_version
+    return if RUBY_PLATFORM != "java"
+    if not ENV["KOKORO_RUBY_VERSION"]
+      STDERR.puts("No kokoro ruby version found, skipping check")
+      return
+    end
+
+    expected = ENV["KOKORO_RUBY_VERSION"].delete_prefix("jruby-")
+    actual = JRUBY_VERSION
+    assert actual.start_with?(expected), "Version #{actual} found, expecting #{expected}"
+  end
+
+end